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/ 13
box of galvanometer parts, including mirrors, wire, and terminal block

box of galvanometer parts, including mirrors, wire, and terminal block

Leeds & Northrup Company
1930-1950
bracket to hold reflecting galvanometer scale and telescope

bracket to hold reflecting galvanometer scale and telescope

Leeds & Northrup Company
early 20th Century
bridge testing switch

bridge testing switch

Leeds & Northrup Company
late 19th-early 20th Century
Chaffee dual quenched spark gap, water cooled

Chaffee dual quenched spark gap, water cooled

Emory Leon Chaffee
circa 1910
Chaffee quenched spark gap

Chaffee quenched spark gap

Emory Leon Chaffee
1910-1911
Chaffee quenched spark gap

Chaffee quenched spark gap

Emory Leon Chaffee
1911-1912
Chaffee quenched spark gap, oil-filled

Chaffee quenched spark gap, oil-filled

Emory Leon Chaffee
1911-1912
Chaffee quenched spark gap, oil-filled

Chaffee quenched spark gap, oil-filled

Emory Leon Chaffee
1911-1912
Chaffee quenched spark gap radio transmitter

Chaffee quenched spark gap radio transmitter

Cutting and Washington Radio Corporation
1915-1916
Chaffe quenched spark gap, earliest water-cooled form

Chaffe quenched spark gap, earliest water-cooled form

Emory Leon Chaffee
1910
current transformer

current transformer

Leeds & Northrup Company
circa 1910
D'Arsonval wall galvanometer on stand with moving coil

D'Arsonval wall galvanometer on stand with moving coil

Leeds & Northrup Company
circa 1910
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